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Asian-Australas J Anim Sci > Accepted Articles
DOI: https://doi.org/10.5713/ajas.17.0451    [Accepted] Published online August 22, 2017.
Rearing Characteristics of Fattening Hanwoo Steers Managed in Different Stocking Densities (R)
Jae-Jung Ha2, Ka-Young Yang3, Dong-Yep Oh4, Jun-Koo Yi5, Jong Joo Kim1,* 
1Yeungnam University, Gyeongsan, Korea
2Gyeongbuk Livestock Research Institute, Yeongju, Korea
3Animal Environment Division National Institute of Animal Science, Wanju, Korea
4Gyeongbuk Livestock Research Institute, Yeongju, Korea
5Gyeongbuk Livestock Research Institute, Yeongju, Korea
Correspondence:  Jong Joo Kim, Tel: 82-53-810-3027, Fax: 82-53-801-3027, Email: kimjj@yumail.ac.kr
Received: 13 June 2017   • Revised: 28 June 2017   • Accepted: 14 August 2017
Abstract
Objective: This study was conducted to analyze the effects of stocking density on growth and carcass quality, and behaviors of Hanwoo cattle to achieve the status of livestock husbandry in accordance with global trends, targeting animal welfare production through the practice of environmentally friendly condition.

Methods

Thirty six steers were randomly assigned to three treatment groups (C: 5 heads, T1: 4 heads, T2: 3 heads) and reared in separate pens with a constant stocking density of 50m2 (C: 10 m2/head, T1: 12.5 m2/head, T2: 16.67 m2/head) per group from 12 to 30 month of age. Growth performance, behavior and carcass quality traits of each steer were recorded and compared between the treatment groups.

Results

In general, the average daily gain during the fattening period was lower in group T2 than in T1 and the control groups. However, carcass weight and dressing percentage was lower in the control group than in T1 or T2 groups (P<0.05). Also, marbling score at 30 months of age was the lowest in the control group (P<0.05), while the three heads group (T2) had the greatest longissimus muscle area and marbling score (P<0.05). The behavior of walking time was the greatest in T2 group, while self-grooming and fighting occurred with the most frequency in the control group (P<0.05).
Conclusion
Our results show that the steers in more spacious stocking density had better carcass quality and wellbeing related behaviors, indicating that spacious stocking density have a positive effect on raising management and carcass quality. Thus it is needed to install appropriate pens fitted to welfare-oriented management practices from growing to fattening period in Hanwoo cattle.
Keywords: Growth; Behavior; Carcass traits; Stocking density; Hanwoo


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